On a Micro, you'd want to use Goomba Color to emulate your GB/GBC games. It does a decent job at most games, but its compatibility is not 100%. You also will not get the colorizations that a GBC would normally apply to old GB games, as that information is stored directly on the GBC BIOS which cannot be dumped. To get these, you'd have to run the original cartridges on a GBC, GBA, or GBA SP.